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6/11/2024
WT Staff
 HAPPENING NOW
Tuesday, June 11, 2024
Flooding ended near Bogalusa, Oberlin, Minden and Coushatta
June 11, 2024 updated 936 am CDT
Drinking Water Advisories
Calcasieu Waterworks District No. 2 (Mossville) issued a system-wide boil water advisory yesterday following a water main break on Old Spanish Trail.
Jeff Davis Water District #4 reported a BWA issued yesterday for the 19000 and 20000 blocks of Elton Drive near Hathaway and Jennings.
Current Streamflow Situation
Streamflows continue to run above seasonal normal to high in the west as fourteen monitors indicate above flood stage. The number of below normal flows has increased overnight, there are two stations sending much below seasonal normal values from Region 3 and another two much below normal in Region 7. Tangipahoa Parish in Region 7 is the one area on the LA drought map again today, rated below normal. No extreme low flows are recorded as of this report, see below for the flood update.
WT USA Flows and Flood Tracker provisional data from the network of USGS streamflow monitors
Fifty-three flood events are recorded on the USGS network Tuesday morning, down from sixty-seven yesterday. WT USA tracks reference flood events through our coverage area in New York, Ohio, Georgia and Louisiana. At the writing of this report, all active flood sites are located in Louisiana.
Louisiana: Four flood events have ended since our initial report this morning. Red River breached flood stage yesterday at Coushatta, the county seat of Red River Parish. As of this report, provisional data show Red River back inside the channel and receding. Region 7 Pearl River is no longer flooding near Bogalusa, this reference incident was over around 8 am EDT this morning. Around the same time, two more sites stopped flooding, Bayou Dorcheat in Region 1 is back in the channel near Minden, and Region 4 Calcasieu River is no longer flooding near Oberlin. Ten sites continue to flood in the monitoring network of USGS Louisiana.
Northwest LA, Region 1 watershed continues with monitored flood incidents at Caddo Lake, Bayou Bodcau Lake, Bayou Dorcheat flooding near Springhill. Region 2 Little River is up in the last twenty four hours, nine inches above the channel near Rochelle. Region 4 west border Sabine River is still flooding near Logansport, Burkeville, Bon Wier and Ruliff. The east side of Region 4 watershed Calcasieu River is running a foot and a half over near Glenmora. Twelvemile Bayou is still running above 99th percentile near Dixie with no flood stage to reference. Sabine River is recorded above 99th percentile at Toledo Bend Reservoir near Burkeville with no flood stage documented. For more information on the flood trend in Louisiana, see black tags indicating flood flow volume and gauge height, blue tags for 99th percentile flows, updated daily on the map to the right.
WT US HABS Tracker
Ohio: Grand Lake beaches have been posted with long term Recreational Public Health advisories for the algal toxin "microcystins", a liver toxin associated with illness in humans and animals. This week marks the first week of mandatory testing for microcystins in raw drinking water supplies. The federal EPA establishes action levels for total microcystins in raw drinking water sources, one level for sensitive populations and another level for the general population. Total Microcystins results for Grand Lake posted to the end of June 8 show a result 44 times above the action level for sensitive populations. Lab test results posted to June 8 for Celina City has total microcystins 13.2 micrograms per liter where the action level is 0.3 for children under 6, pregnant and nursing mothers and those with kidney and liver conditions. The action level for the general population is 1.6, the Celina water supply is eight and a half times over that threshold. Celina City is fortunate to have an alternate, groundwater supply.
For more information on HABs, see WT US coverage area reports:
New York HAB report here
Ohio HAB report here
Louisiana HAB report here
Inquire about microcystins testing in your local water supply.
As many drinking water facilities are supplied from surface water reservoirs, the streamflow situation is pertinent to both drinking water supply and quality. High flows can stir up sediment and cause turbidity in the reservoirs, requiring additional treatments to render the water potable. Low flow volume is linked to warmer temperatures in the reservoir and can be an issue for water quality where HABs are present. WT tracks streamflow trends with an eye to the impacts on drinking water supply and quality in each of the state's watersheds. Check the watershed layer on the map to see the direction of flow and streamflows that may be impacting drinking water today.
USGS Provisional Data Statement
Data are provisional and subject to revision until they have been thoroughly reviewed and received final approval. Current condition data relayed by satellite or other telemetry are automatically screened to not display improbable values until they can be verified.
Provisional data may be inaccurate due to instrument malfunctions or physical changes at the measurement site. Subsequent review based on field inspections and measurements may result in significant revisions to the data.
Data users are cautioned to consider carefully the provisional nature of the information before using it for decisions that concern personal or public safety or the conduct of business that involves substantial monetary or operational consequences. Information concerning the accuracy and appropriate uses of these data or concerning other hydrologic data may be obtained from the USGS.
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